Patents Examined by S. L. Childs
  • Patent number: 4596721
    Abstract: Fine quality catenated phosphorus thin films are produced in a high vacuum evaporator. Heated tungsten wire crackers are provided above the phosphorus boat and below the substrates. Amorphous pure phosphorus shiny red films have been deposited on glass, metallized glass and GaP and exhibit an optical edge at 2.0 eV. Films of KP.sub.x where x is equal to 15 or greater than 15 are produced by utilizing a second baffled boat source containing the potassium graphite intercalate, KC.sub.8. Addition of a nickel evaporation source provides nickel-doped polyphosphide films.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: June 24, 1986
    Assignee: Stauffer Chemical Company
    Inventors: David G. Brock, John A. Baumann
  • Patent number: 4581252
    Abstract: Light guide articles made of glassy polymers are provided with a gradually varying refractive index by immersion in a solution of a substance having a different refractive index and which swells the glassy polymer under the immersion conditions and thereafter heating the article under conditions to remove the solvent and leave the substance of different refractive index under the surface of the article.
    Type: Grant
    Filed: August 14, 1985
    Date of Patent: April 8, 1986
    Assignee: Montedison S.p.A.
    Inventors: Gaetano Guerra, Umberto Mandara, Antonio Moschetti
  • Patent number: 4576837
    Abstract: The method of treating a surface chemically by exposing the surface to a treating gas at high pressure for a time during which a surface reaction occurs, and then reducing the pressure of the gas for a time and removing reaction byproducts and then continuing the cycles of high pressure and low pressure until the surface reaction is completed.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: March 18, 1986
    Assignee: Tarancon Corporation
    Inventors: Gregorio Tarancon, Efrain Acevedo, Abel Saud
  • Patent number: 4574093
    Abstract: Deposited layers are advantageously obtained by utilizing a specific vapor deposition procedure. In this procedure, a substrate is positioned a relatively short distance from the source of a gas flow capable of producing the desired deposition. This gas flow is directed so that it contacts an interior region of the substrate and moves from the initial contact point to a point on the periphery of the substrate. Exemplary of such gas flow configurations is the positioning of a substrate at a small distance above a fused quartz frit through which the deposition gas flow is directed.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: March 4, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Herbert M. Cox
  • Patent number: 4572848
    Abstract: Silicon-infiltrated, reaction-bonded silicon carbide molded bodies for application in machine building are produced by means of a siliconizing apparatus, comprising a graphite plate coated with boron nitride, a porous silicon carbide plate coated with a layer of boron nitride, silicon carbide and carbon and a layer of lumpy metallic silicon inserted between the two plates. Furthermore, following the heating and solidification of the liquid silicon, wherein due to the increase in volume of the silicon, beads of silicon appear at the surface of the molded body, these may be easily removed when the infiltrated silicon carbide molded bodies are cooled in a nitrogen atmosphere.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: February 25, 1986
    Assignee: Hoechst CeramTec Aktiengesellschaft
    Inventors: Werner Pollak, Michael Blecha, Gerhard Specht
  • Patent number: 4572873
    Abstract: The present invention relates to a titanium disulfide film fabricated on a substrate, where crystallites of titanium disulfide is oriented at an angle of their c-axis to the substrate surface of not more than 45.degree., and to a process for fabricating the film, where the film is prepared by chemical vapor deposition from TiCl.sub.4 and H.sub.2 S as source gases under an inner pressure of reaction tube of 30 kPa or less.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: February 25, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Keiichi Kanehori, Katsuki Miyauchi, Tetsuichi Kudo
  • Patent number: 4568572
    Abstract: A method for coating a substrate with alumina which comprises contacting a substrate with a supersaturated aqueous alkali aluminate solution having an alkali metal hydroxide concentration ranging from 0.75 to 1.5 molar and an aluminum to alkali mole ratio ranging from 0.65 to 0.70 is provided.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: February 4, 1986
    Assignee: Texaco Inc.
    Inventors: Kung Y. Lee, Matthew A. McMahon
  • Patent number: 4564537
    Abstract: Silica may be deposited on metal surfaces e.g. on heat exchanger surfaces to reduce undesirable deposits by the following aqueous process. Finely divided moist silicic acid of defined particle size is mixed with hot (e.g. at least 98.5.degree. C.) pure water for not more than 1 hour. The mixture is subjected to depolymerization by heating at specified pH so as to depolymerize substantially all the silica. The resulting aqueous silica is then passed over the surface to be coated at temperature above 80.degree. C. so as to deposit a hard bound silica coating.
    Type: Grant
    Filed: January 18, 1985
    Date of Patent: January 14, 1986
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Frederick D. Austin, Peter Watson
  • Patent number: 4556584
    Abstract: A method is disclosed for providing substantially effluent-waste free vacuum chemical vapor deposition of thin-film on semiconductor substrates. A first comparatively low efficiency diffusion furnace deposits selected thin-film on the semiconductor substrates. A second comparatively high-efficiency diffusion furnace operative in response to the effluent-waste stream of the first diffusion furnace deposits substantially all of the effluent-waste on throw-away baffles.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: December 3, 1985
    Assignee: BTU Engineering Corporation
    Inventor: Robert F. Sarkozy
  • Patent number: 4551356
    Abstract: Process for producing antireflection layer on viewing screens. A film-like layer of a varnish containing first agent is put on the outer side of the screen and while this layer is still wet it is processed with a second agent in the form of a dispersion in water of a silicate or a silicic acid, the second agent being such as to take part in a reaction with the first agent while it is on the screen. It is furthermore possible for the two agents to be mixed and then put on. Whichever of the two possible forms of the method is used, one may be certain of producing a cured or hardened layer greatly cutting down reflection.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: November 5, 1985
    Assignee: Therese Heiz
    Inventor: Hans Heiz
  • Patent number: 4543275
    Abstract: A process for forming a vapor-deposited thin layer of organic material is disclosed. The process involves placing organic material on a support base within a vacuum chamber and providing a heat source in the vicinity of the organic material. A second support base is then provided within the vacuum chamber and heat is applied to the organic material at a temperature which causes the organic material to form vapors. The vapors are vapor-deposited on the second support base forming the thin layer of organic material. It is generally desirable to move both of the support bases during the vapor deposition process allowing the formation of a continuous uniform thin layer of organic material.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: September 24, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Goro Akashi, Akira Nahara, Yoshihiro Arai
  • Patent number: 4543295
    Abstract: High temperature polyimide film laminates and a process for fabricating large-area, void-free polyimide laminate structures wherein multiple-ply polyimide film laminates may be constructed without decreasing the individual film strength and wherein layers of metal foil may be laminated between polyimide film layers to yield a flexible high temperature resistant structure having capabilities for use as flexible electric circuits, in aerospace applications, and the like.
    Type: Grant
    Filed: October 24, 1984
    Date of Patent: September 24, 1985
    Assignee: The United States of America as represented by the director of the National Aeronautics and Space Administration
    Inventors: Anne K. St. Clair, Terry L. St. Clair
  • Patent number: 4540631
    Abstract: A method is provided by which a silver coating is applied to a polymeric substrate using an aqueous solution of silver nitrate. Also provided is a method for incorporation of silver as silver nitrate into a polymeric composition suitable for molding.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: September 10, 1985
    Assignee: Phillips Petroleum Company
    Inventor: Harold D. Boultinghouse
  • Patent number: 4537790
    Abstract: The present invention relates to a process for growing cell cultures of diploid cells. The process comprises the steps of(a) introducing cell culture medium into a container containing cell support prepared by applying to glass or polysaccharide base support a solution of thermosetting plastic material comprising the reaction product of an aldehyde with a polyvinyl alcohol and then subjecting said support thus-coated to the effect of heat under sufficient conditions to permit hardening of said thermosetting plastic material and the sterilization of the thus-coated support;(b) adding human or animal diploid cells to the culture medium of step (a) to form a cell-containing culture medium; and(c) maintaining the cell-containing culture medium of step (b) under cell growth conditions.
    Type: Grant
    Filed: May 11, 1983
    Date of Patent: August 27, 1985
    Assignee: Institut Pasteur
    Inventors: Florian Horodniceanu, Raphael Le Fur
  • Patent number: 4537797
    Abstract: Pressure- or heat-sensitive record material carries hydrated zirconia as a color developer material. The hydrated zirconia may be modified by the presence of compounds or ions of one or more multivalent metals. The record material may be made by forming an aqueous dispersion of hydrated zirconia, either formulating the dispersion into a coating composition and applying the coating composition to a substrate web or introducing the dispersion into a paper making stock and forming a paper web which incorporates hydrated zirconia as a loading, and drying the resulting coated or loaded web to produce the record material.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: August 27, 1985
    Assignee: The Wiggins Teape Group Limited
    Inventor: Kenneth J. Shanton
  • Patent number: 4536419
    Abstract: Method for forming thin films on a substrate by using a mask through dry process wherein the substrate and the mask are moved relative to each other at least once for the formation of a thin film before the thickness of the thin film being formed on the substrate reaches a predetermined value, so that the formed thin film has an outer edge partly or entirely contoured stepwise.
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: August 20, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Kubota, Minoru Tanaka, Susumu Aiuchi
  • Patent number: 4536417
    Abstract: A method for repairing and restoring a deteriorated cement-containing inorganic material such as reinforced concrete by applying a solution of a water-soluble silicate compound to its surface to have it impregnated with said solution, and then topcoating said material with cement paste or/and mortar.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: August 20, 1985
    Assignee: Onoda Construction Materials Co., Ltd.
    Inventor: Toshihiko Shimizu
  • Patent number: 4530859
    Abstract: A method of preparing a storage-stable one-part reactive liquid thermal curing polymeric coating composition from an isocyanate-functional polymeric compound which has a substantial portion of its isocyanate groups masked with an isocyanate masking agent, and a crosslinking agent which is substantially insoluble in aprotic solvents. These liquid compositions are homogeneous even when free of solvents. Preferably the crosslinking agent is a crystalline polyol. The method involves the synthesis of a solubilizing oligomer which is formed by the partial reaction of the crosslinking agent and the unmasked isocyanate-functional polymeric compound. The thermal curing of these compositions results in polymeric coatings which possess superior physical properties. These cured coatings are particularly useful in the manufacture of retroreflective sheeting.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: July 23, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Raymond E. Grunzinger, Jr.
  • Patent number: 4530857
    Abstract: The invention relates to a stabilized composition for coating glass containers, and to its method of use. The method involves the steps of heating the surface of a glass container to at least 800.degree. F., and spraying the surface of the glass with a glass coating formulation comprising monoalkyltin trihalide and about 0.5 to 10 parts by weight per hundred parts monoalkyltin trihalide of a solubilizing material.
    Type: Grant
    Filed: May 13, 1983
    Date of Patent: July 23, 1985
    Assignee: M&T Chemicals Inc.
    Inventor: Georg H. Lindner
  • Patent number: 4528215
    Abstract: In the pack diffusion coating of chromium into the surface of a superalloy, the formation of undesirable oxide inclusion is reduced when the diffusion coating pack contains at least about 3% Ni.sub.3 Al. Also the formation of alpha-chromium is reduced when the pack diffusion is carried out in a retort effectively not over five inches in height. On the other hand an alpha-chromium-rich layer at least 0.2 mil thick can be deliberately formed and the superalloy thus coated subjected to an aluminizing treatment to convert the alpha-chromium into islands that provide very high sulfidation resistance. Pack aluminizing in the presence of chromium makes a very effective aluminum- or chromium-containing top coating over platinum plated or platinum coated nickel-base superalloys. Depletion of diffusible material from workpieces heated in a powder-pack can also provide a surface on which aluminizing produces a highly impact-resistant coating.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: July 9, 1985
    Assignee: Alloy Surfaces Company, Inc.
    Inventors: Alfonso L. Baldi, Victor V. Damiano